49781857 has 8 divisors (see below), whose sum is σ = 50746176. Its totient is φ = 48826992.

The previous prime is 49781833. The next prime is 49781903. The reversal of 49781857 is 75818794.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49781857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49781857.

It is not an unprimeable number, because it can be changed into a prime (49781357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8763 + ... + 13279.

It is an arithmetic number, because the mean of its divisors is an integer number (6343272).

Almost surely, 2^49781857 is an apocalyptic number.

It is an amenable number.

49781857 is a deficient number, since it is larger than the sum of its proper divisors (964319).

49781857 is a wasteful number, since it uses less digits than its factorization.

49781857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727.

The product of its digits is 564480, while the sum is 49.

The square root of 49781857 is about 7055.6259112853. The cubic root of 49781857 is about 367.8666050271.

The spelling of 49781857 in words is "forty-nine million, seven hundred eighty-one thousand, eight hundred fifty-seven".